Reduction Mechanism of Fluoroethylene Carbonate for Stable Solid-Electrolyte Interphase Film on Silicon Anode

ChemSusChem ◽  
2013 ◽  
Vol 7 (2) ◽  
pp. 549-554 ◽  
Author(s):  
Xilin Chen ◽  
Xiaolin Li ◽  
Donghai Mei ◽  
Ju Feng ◽  
Mary Y. Hu ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Silicon Anode ◽  
Reduction Mechanism ◽  
Solid Electrolyte Interphase Film ◽  
Fluoroethylene Carbonate

scholarly journals Probing the Na metal solid electrolyte interphase via cryo-transmission electron microscopy

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Bing Han ◽  
Yucheng Zou ◽  
Zhen Zhang ◽  
Xuming Yang ◽  
Xiaobo Shi ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Metal Electrode ◽  
Liquid Electrolyte ◽  
Battery Materials ◽  
Cryogenic Transmission Electron Microscopy ◽  
Transmission Electron ◽  
Fluoroethylene Carbonate

AbstractCryogenic transmission electron microscopy (cryo-TEM) is a valuable tool recently proposed to investigate battery electrodes. Despite being employed for Li-based battery materials, cryo-TEM measurements for Na-based electrochemical energy storage systems are not commonly reported. In particular, elucidating the chemical and morphological behavior of the Na-metal electrode in contact with a non-aqueous liquid electrolyte solution could provide useful insights that may lead to a better understanding of metal cells during operation. Here, using cryo-TEM, we investigate the effect of fluoroethylene carbonate (FEC) additive on the solid electrolyte interphase (SEI) structure of a Na-metal electrode. Without FEC, the NaPF6-containing carbonate-based electrolyte reacts with the metal electrode to produce an unstable SEI, rich in Na2CO3 and Na3PO4, which constantly consumes the sodium reservoir of the cell during cycling. When FEC is used, the Na-metal electrode forms a multilayer SEI structure comprising an outer NaF-rich amorphous phase and an inner Na3PO4 phase. This layered structure stabilizes the SEI and prevents further reactions between the electrolyte and the Na metal.

scholarly journals Surface-enhanced Raman spectroscopy (SERS): a powerful technique to study the SEI layer in batteries

2021 ◽  
Author(s):  
M. J. Piernas-Muñoz ◽  
A. Tornheim ◽  
S. Trask ◽  
Z. Zhang ◽  
I. Bloom
Keyword(s):  
Raman Spectroscopy ◽  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Surface Enhanced Raman Spectroscopy ◽  
Silicon Anode ◽  
Powerful Technique ◽  
Sei Layer ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

The solid electrolyte interphase (SEI) layer on a silicon anode is investigated by SERS.

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